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20578 (1999 RH149)
Classification: Main-belt Asteroid          SPK-ID: 2020578
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02694521774366953 3.1584e-08  
a 3.013757152281228 1.5926e-08 au
q 2.932550809586469 9.2343e-08 au
i 10.22261337677929 4.7709e-06 deg
node 157.3762624111496 1.9337e-05 deg
peri 109.1783228687941 0.00010181 deg
M 54.97829032452823 9.8582e-05 deg
tp 2458708.656827614202
(2019-Aug-13.15682761)
0.00052392 TDB
period 1911.000532004789
5.23
1.5148e-05
4.147e-08
d
yr
n .1883829930818134 1.4933e-09 deg/d
Q 3.094963494975987 1.6356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      11339 days (31.04 yr)  
   first obs. used      1989-10-07  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50976  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:58  

Additional Information
 Earth MOID = 1.93542 au 
 Jupiter MOID = 1.94517 au 
 T_jup = 3.224 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO492968  
diameter diameter 5.145 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 1.13 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.202   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20578 (1999 RH149)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RH149 = 1989 TK7 = 1998 KT53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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